A157157 Nonprime numbers containing equal number of odd nonprime digits and even prime digits.

12, 21, 92, 102, 120, 123, 124, 125, 126, 128, 132, 142, 152, 162, 172, 182, 201, 209, 210, 213, 214, 215, 216, 217, 218, 231, 249, 259, 261, 279, 289, 290, 294, 295, 296, 297, 298, 312, 321, 329, 392, 412, 429, 492, 512, 529, 592, 612, 621, 629, 692, 712

Offset

1,1

Comments

Odd nonprime digits are 1 or 9 and even prime digit = 2.

The definition presumably implies that the number of odd nonprime digits and the number of even prime digits are both larger than zero. [From R. J. Mathar, Feb 26 2009]

Links

Table of n, a(n) for n=1..52.

Crossrefs

Cf. A141468.

Sequence in context: A137480 A316267 A228766 * A218043 A048344 A039402

Adjacent sequences: A157154 A157155 A157156 * A157158 A157159 A157160

Keyword

nonn,base,less

Author

Juri-Stepan Gerasimov, Feb 24 2009

Extensions

Missing numbers added by R. J. Mathar, Feb 26 2009

Status

approved